alertDialog与PositiveButton和NegativeButton从XML [英] alertDialog with PositiveButton and NegativeButton from xml

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本文介绍了alertDialog与PositiveButton和NegativeButton从XML的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我已经警告对话框无一不PositiveButton和NegativeButton选址编程，我想从XML布局检索它们，我尝试做，但即时通讯新Android开发，

任何帮助将AP preciated，谢谢。

MainActivity：

 公共类MainActivity延伸活动{
最终的上下文语境=这一点;
私人Button按钮;
/ **第一次创建活动时调用。 * /
@覆盖
公共无效的onCreate（包savedInstanceState）{
     super.onCreate（savedInstanceState）;

     的setContentView（R.layout.main）;

    TextView的电视=（TextView中）findViewById（R.id.introclusion_tv1）;
    tv.setTypeface（FontFactory.getBFantezy（getBaseContext（）））;

    TextView的TV1 =（TextView中）findViewById（R.id.introclusion_tv2）;
    tv1.setTypeface（FontFactory.getBFantezy（getBaseContext（）））;
    tv1.setText（Html.fromHtml（的getString（R.string.introclusion）））;



按钮=（按钮）findViewById（R.id.button1）;

//添加按钮监听器
button.setOnClickListener（新OnClickListener（）{

    @覆盖
    公共无效的onClick（查看为arg0）{

        LayoutInflater李= LayoutInflater.from（arg0.getContext（））;
        最后查看dialog_layoutView = li.inflate（R.layout.dialog_layout，NULL）;
        AlertDialog.Builder alertDialogBu​​ilder =新AlertDialog.Builder（arg0.getContext（））;

        alertDialogBu​​ilder.setView（dialog_layoutView）;
        alertDialogBu​​ilder

                .setCancelable（假）
                .setPositiveButton（OK，

                        新DialogInterface.OnClickListener（）{
                        公共无效的onClick（DialogInterface对话框，INT ID）{

                            EditText上的用户名=（EditText上）dialog_layoutView.findViewById（R.id.txt_name）;
                            的EditText密码=（EditText上）dialog_layoutView.findViewById（R.id.password）;

                                如果（username.getText（）的toString（）长度（）＆GT; 0安培;＆安培; password.getText（）的toString（）长度（）＆GT; 0）{
                                    如果（username.getText（）的toString（）等于（测试）及。＆安培; password.getText（）的toString（）等于（测试）。）{
                                意向意图=新的意图（MainActivity.this，Text.class）;
                                startActivity（意向）;
                                完（）;}
                                    其他{
                                        //得到你的custom_toast.xml布局
                                        LayoutInflater充气= getLayoutInflater（）;

                                        查看布局= inflater.inflate（R.layout.custom_toast，
                                                （ViewGroup中）findViewById（R.id.custom_toast））;

                                        //设置一个虚拟形象
                                        ImageView的形象=（ImageView的）layout.findViewById（R.id.image_toast）;
                                        image.setImageResource（R.drawable.ic_launcher）;

                                        //设置消息
                                        TextView的文字=（TextView的）layout.findViewById（R.id.text_toast）;
                                        text.setText（错误的用户名或密码）;

                                        //吐司...
                                        吐司面包=新吐司（getApplicationContext（））;
                                        toast.setGravity（Gravity.CENTER_VERTICAL，0，0）;
                                        toast.setDuration（Toast.LENGTH_LONG）;
                                        toast.setView（布局）;
                                        toast.show（）;}}}


                        }）
                .setNegativeButton（取消，
                        新DialogInterface.OnClickListener（）{
                            公共无效的onClick（DialogInterface对话框，
                                    INT编号）{
                                dialog.cancel（）;
                            }
                        }）;

        //创建警报对话框
        AlertDialog alertDialog = alertDialogBu​​ilder.create（）;

        // 展示下
        alertDialog.show（）;

    }

}）;

 }

 }

dialog_layout.xml：

 ＆LT; XML版本=1.0编码=UTF-8＆GT？;
＆LT; LinearLayout中的xmlns：机器人=htt​​p://schemas.android.com/apk/res/android
机器人：layout_width =FILL_PARENT
机器人：layout_height =FILL_PARENT
机器人：方向=垂直
机器人：填充=10SP＆GT;

＆LT;的EditText
    机器人：ID =@ + ID / txt_name
    机器人：layout_width =FILL_PARENT
    机器人：layout_height =WRAP_CONTENT
    机器人：提示=@字符串/ dialog_uname
    机器人：单线=真正的＆GT;

    ＆LT;不是requestFocus /＆GT;
＆LT; /的EditText＆GT;

＆LT;的EditText
    机器人：ID =@ + ID /密码
    机器人：layout_width =match_parent
    机器人：layout_height =WRAP_CONTENT
    机器人：EMS =10
    机器人：inputType =textPassword＆GT;
＆LT; /的EditText＆GT;

＆LT; RelativeLayout的
    机器人：layout_width =match_parent
    机器人：layout_height =WRAP_CONTENT＆GT;

    ＆LT;按钮
        机器人：ID =@ + ID / btn_ok
        机器人：layout_width =120dp
        机器人：layout_height =WRAP_CONTENT
        机器人：文本=@字符串/ dialog_submit/＆GT;

    ＆LT;按钮
        机器人：ID =@ + ID / btn_cancel
        机器人：layout_width =120dp
        机器人：layout_height =WRAP_CONTENT
        机器人：layout_alignParentTop =真
        机器人：layout_marginLeft =10dp
        机器人：layout_toRightOf =@ + ID / btn_ok
        机器人：文本=@字符串/ dialog_cancel/＆GT;
＆LT; / RelativeLayout的＆GT;

编辑：

 公共类MainActivity延伸活动{
最终的上下文语境=这一点;
私人Button按钮;
/ **第一次创建活动时调用。 * /
@覆盖
公共无效的onCreate（包savedInstanceState）{
     super.onCreate（savedInstanceState）;

     的setContentView（R.layout.main）;

    TextView的电视=（TextView中）findViewById（R.id.introclusion_tv1）;
    tv.setTypeface（FontFactory.getBFantezy（getBaseContext（）））;

    TextView的TV1 =（TextView中）findViewById（R.id.introclusion_tv2）;
    tv1.setTypeface（FontFactory.getBFantezy（getBaseContext（）））;
    tv1.setText（Html.fromHtml（的getString（R.string.introclusion）））;



按钮=（按钮）findViewById（R.id.button1）;

//添加按钮监听器
button.setOnClickListener（新OnClickListener（）{

    @覆盖
    公共无效的onClick（查看为arg0）{

        LayoutInflater李= LayoutInflater.from（arg0.getContext（））;
        最后查看dialog_layoutView = li.inflate（R.layout.dialog_layout，NULL）;
        AlertDialog.Builder alertDialogBu​​ilder =新AlertDialog.Builder（arg0.getContext（））;

        alertDialogBu​​ilder.setView（dialog_layoutView）;
        alertDialogBu​​ilder

        .setCancelable（假）;

                        /////////

                按钮okBtn =（按钮）dialog_layoutView.findViewById（R.id.btn_ok）;
                okBtn.setOnClickListener（新OnClickListener（）
                {
                    @覆盖
                    公共无效的onClick（视图v）
                    {
                        EditText上的用户名=（EditText上）dialog_layoutView.findViewById（R.id.txt_name）;
                        的EditText密码=（EditText上）dialog_layoutView.findViewById（R.id.password）;

                            如果（username.getText（）的toString（）长度（）＆GT; 0安培;＆安培; password.getText（）的toString（）长度（）＆GT; 0）{
                                如果（username.getText（）的toString（）等于（测试）及。＆安培; password.getText（）的toString（）等于（测试）。）{
                            意向意图=新的意图（MainActivity.this，Text.class）;
                            startActivity（意向）;
                            完（）;}
                                其他{
                                    //得到你的custom_toast.xml布局
                                    LayoutInflater充气= getLayoutInflater（）;

                                    查看布局= inflater.inflate（R.layout.custom_toast，
                                            （ViewGroup中）findViewById（R.id.custom_toast））;

                                    //设置一个虚拟形象
                                    ImageView的形象=（ImageView的）layout.findViewById（R.id.image_toast）;
                                    image.setImageResource（R.drawable.ic_launcher）;

                                    //设置消息
                                    TextView的文字=（TextView的）layout.findViewById（R.id.text_toast）;
                                    text.setText（错误的用户名或密码）;

                                    //吐司...
                                    吐司面包=新吐司（getApplicationContext（））;
                                    toast.setGravity（Gravity.CENTER_VERTICAL，0，0）;
                                    toast.setDuration（Toast.LENGTH_LONG）;
                                    toast.setView（布局）;
                                    toast.show（）;}}}}
                        ）;
                按钮cancelBtn =（按钮）dialog_layoutView.findViewById（R.id.btn_cancel）;

                cancelBtn.setOnClickListener（新OnClickListener（）
                {
                    @覆盖
                    公共无效的onClick（视图v）
                    {
                        dialog.cancel（）;
                    }
                }）;
                ///////



        //创建警报对话框
        AlertDialog alertDialog = alertDialogBu​​ilder.create（）;

        // 展示下
        alertDialog.show（）;

    }

}）;
   }
  }

解决方案

您可以使用 dialog_layout 来检索您的按钮为你做你的的EditText 

 按钮okBtn =（按钮）dialog_layout.findViewById（R.id.btn_ok）;
按钮cancelBtn =（按钮）dialog_layout.findViewById（R.id.btn_cancel）;

然后设置 onClickListener 取值

  okBtn.setOnClickListener（新OnClickListener（）
{
    @覆盖
    公共无效的onClick（视图v）
    {
        //一些code
    }
}）;
cancelBtn.setOnClickListener（新OnClickListener（）
{
    @覆盖
    公共无效的onClick（视图v）
    {
        //一些code
    }
}）;

I have alert dialog and both PositiveButton and NegativeButton sited programmatically , i want to retrieve them from xml layout ,i try to do it but im new to android development ,

any help will be appreciated , thanks.

MainActivity:

 public class MainActivity extends Activity {
final Context context = this;
private Button button;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);

     setContentView(R.layout.main);  

    TextView tv=(TextView)findViewById(R.id.introclusion_tv1);
    tv.setTypeface(FontFactory.getBFantezy(getBaseContext()));

    TextView tv1=(TextView)findViewById(R.id.introclusion_tv2);
    tv1.setTypeface(FontFactory.getBFantezy(getBaseContext()));
    tv1.setText(Html.fromHtml(getString(R.string.introclusion)));



button = (Button) findViewById(R.id.button1);

// add button listener
button.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View arg0) {

        LayoutInflater li = LayoutInflater.from(arg0.getContext());
        final View dialog_layoutView = li.inflate(R.layout.dialog_layout, null);
        AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(arg0.getContext());

        alertDialogBuilder.setView(dialog_layoutView);
        alertDialogBuilder

                .setCancelable(false)
                .setPositiveButton("OK",

                        new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog,int id) {

                            EditText username = (EditText) dialog_layoutView.findViewById(R.id.txt_name);
                            EditText password = (EditText) dialog_layoutView.findViewById(R.id.password);

                                if(username.getText().toString().length() > 0 && password.getText().toString().length() > 0 ) {
                                    if(username.getText().toString().equals("test") && password.getText().toString().equals("test")) {
                                Intent intent = new Intent(MainActivity.this,Text.class);
                                startActivity(intent);
                                finish();}
                                    else{
                                        // get your custom_toast.xml layout
                                        LayoutInflater inflater = getLayoutInflater();

                                        View layout = inflater.inflate(R.layout.custom_toast,
                                                (ViewGroup) findViewById(R.id.custom_toast));

                                        // set a dummy image
                                        ImageView image = (ImageView) layout.findViewById(R.id.image_toast);
                                        image.setImageResource(R.drawable.ic_launcher);

                                        // set a message
                                        TextView text = (TextView) layout.findViewById(R.id.text_toast);
                                        text.setText("Wrong username or password");

                                        // Toast...
                                        Toast toast = new Toast(getApplicationContext());
                                        toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
                                        toast.setDuration(Toast.LENGTH_LONG);
                                        toast.setView(layout);
                                        toast.show();}}}    


                        })
                .setNegativeButton("Cancel",
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog,
                                    int id) {
                                dialog.cancel();
                            }
                        });

        // create alert dialog
        AlertDialog alertDialog = alertDialogBuilder.create();

        // show it
        alertDialog.show();

    }

});

 }

 }

dialog_layout.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:padding="10sp" >

<EditText
    android:id="@+id/txt_name"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:hint="@string/dialog_uname"
    android:singleLine="true" >

    <requestFocus />
</EditText>

<EditText
    android:id="@+id/password"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ems="10"
    android:inputType="textPassword" >
</EditText>

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >

    <Button
        android:id="@+id/btn_ok"
        android:layout_width="120dp"
        android:layout_height="wrap_content"
        android:text="@string/dialog_submit" />

    <Button
        android:id="@+id/btn_cancel"
        android:layout_width="120dp"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="10dp"
        android:layout_toRightOf="@+id/btn_ok"
        android:text="@string/dialog_cancel" />
</RelativeLayout>

EDIT :

  public class MainActivity extends Activity {
final Context context = this;
private Button button;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);

     setContentView(R.layout.main);  

    TextView tv=(TextView)findViewById(R.id.introclusion_tv1);
    tv.setTypeface(FontFactory.getBFantezy(getBaseContext()));

    TextView tv1=(TextView)findViewById(R.id.introclusion_tv2);
    tv1.setTypeface(FontFactory.getBFantezy(getBaseContext()));
    tv1.setText(Html.fromHtml(getString(R.string.introclusion)));



button = (Button) findViewById(R.id.button1);

// add button listener
button.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View arg0) {

        LayoutInflater li = LayoutInflater.from(arg0.getContext());
        final View dialog_layoutView = li.inflate(R.layout.dialog_layout, null);
        AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(arg0.getContext());

        alertDialogBuilder.setView(dialog_layoutView);
        alertDialogBuilder

        .setCancelable(false);

                        /////////

                Button okBtn= (Button) dialog_layoutView.findViewById(R.id.btn_ok);
                okBtn.setOnClickListener(new OnClickListener()
                {
                    @Override
                    public void onClick(View v)
                    {
                        EditText username = (EditText) dialog_layoutView.findViewById(R.id.txt_name);
                        EditText password = (EditText) dialog_layoutView.findViewById(R.id.password);

                            if(username.getText().toString().length() > 0 && password.getText().toString().length() > 0 ) {
                                if(username.getText().toString().equals("test") && password.getText().toString().equals("test")) {
                            Intent intent = new Intent(MainActivity.this,Text.class);
                            startActivity(intent);
                            finish();}
                                else{
                                    // get your custom_toast.xml layout
                                    LayoutInflater inflater = getLayoutInflater();

                                    View layout = inflater.inflate(R.layout.custom_toast,
                                            (ViewGroup) findViewById(R.id.custom_toast));

                                    // set a dummy image
                                    ImageView image = (ImageView) layout.findViewById(R.id.image_toast);
                                    image.setImageResource(R.drawable.ic_launcher);

                                    // set a message
                                    TextView text = (TextView) layout.findViewById(R.id.text_toast);
                                    text.setText("Wrong username or password");

                                    // Toast...
                                    Toast toast = new Toast(getApplicationContext());
                                    toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
                                    toast.setDuration(Toast.LENGTH_LONG);
                                    toast.setView(layout);
                                    toast.show();}}}}
                        );
                Button cancelBtn = (Button) dialog_layoutView.findViewById(R.id.btn_cancel);    

                cancelBtn.setOnClickListener(new OnClickListener()
                {
                    @Override
                    public void onClick(View v)
                    {
                        dialog.cancel();
                    }
                });
                ///////



        // create alert dialog
        AlertDialog alertDialog = alertDialogBuilder.create();

        // show it
        alertDialog.show();

    }

});
   }
  }

解决方案

You can use your dialog_layout to retrieve your Buttons as you did with your EditText

Button okBtn= (Button) dialog_layout.findViewById(R.id.btn_ok);
Button cancelBtn = (Button) dialog_layout.findViewById(R.id.btn_cancel);

then set you onClickListeners

okBtn.setOnClickListener(new OnClickListener()
{
    @Override
    public void onClick(View v)
    {
        // some code
    }
});
cancelBtn.setOnClickListener(new OnClickListener()
{
    @Override
    public void onClick(View v)
    {
        // some code
    }
});

这篇关于alertDialog与PositiveButton和NegativeButton从XML的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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